Question

What is 7/10 - 1/15?

Answer 1

$\frac{7}{10}-\frac{1}{15}=\frac{7 \times 3}{10 \times 3}-\frac{1 \times 2}{15 \times 2}=\frac{21}{30}-\frac{2}{30}=\frac{21-2}{30}=\frac{19}{30}$